JP2004069220A - Outdoor unit of air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a trouble from occurring by simplifying the structure of an outdoor unit base and preventing, by a heater, drain from a heat exchanger from being re-frozen on the outdoor unit base. <P>SOLUTION: On the base 1, the heater 3 is disposed below the heat exchanger 2, and the heater 3 is fixed to the base 1 by pressing, against the base 1, an isolator 5 in such a shape as to cover the heater 3 portion around a drain hole 4 so that the heater 3 is not exposed. A hole is provided at the center part of the isolator 5 in such a shape as to not interfere with a drain socket 7 fitted to the drain hole 4 from the underside. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to prevention of freezing by an outdoor unit-based drain heater in which a heat exchanger in an outdoor unit of an air conditioner is installed.
[0002]
[Prior art]
4 and 5 show a base portion of an outdoor unit of a conventional air conditioner disclosed in Japanese Utility Model Publication No. 63-69926, and are a sectional view (A-A sectional view in FIG. 5) and a perspective view, respectively. It is.
In these drawings, the structure of the outdoor unit is such that a heater 30 is disposed on the protruding portion of the outdoor unit base 10a, a flange is provided on the outdoor unit base 10a side, and the outdoor unit base 10b functions as a heat transfer material. The heat exchanger 2 is placed, and the heater 30 is housed in the lower part of the heat exchanger 2 so that the heater 30 is sandwiched between the outdoor unit base 10a and the outdoor unit base 10b, and the outdoor unit base on the lower surface of the heat exchanger 2 10a and the outdoor unit base 10b are provided with a drain hole 40 having a long hole shape, and the drain is discharged to the outside.
[0003]
In the outdoor unit configured as described above, the drain from the heat exchanger 2 is prevented from refreezing in the winter by the heat of the heater 30, and the drain is discharged from the drain hole 40 to the outside.
[0004]
[Problems to be solved by the invention]
As described above, the conventional outdoor unit has a plurality of structures of the outdoor unit bases 10a and 10b on which the heater 30 is installed, and the drain hole 40 has a long hole shape. It was not possible to handle with a hose.
[0005]
The present invention has been made in order to solve the above-described problems. The present invention simplifies the structure of the outdoor unit base, and even in winter, the drain from the heat exchanger is re-frozen on the outdoor unit base. The purpose is to prevent the occurrence of defects.
[0006]
[Means for Solving the Problems]
An outdoor unit of an air conditioner according to the present invention is an outdoor unit in which a heat exchanger is installed on an outdoor unit base, and a tubular heater is shaped to follow the outer peripheral shape of the bottom of the heat exchanger and is substantially closed. In addition, it is formed in a shape that is approximately the same size as the outer shape, and the heater is placed on the flat bottom of the outdoor unit base so that it surrounds the heat exchanger, or more than half of the shape is under the heat exchanger. In addition, the drain hole that opens in the flat bottom of the outdoor unit base is installed so that it is within the substantially closed shape of the heater.
Therefore, since the heater is shaped to follow the outer peripheral shape of the bottom of the heat exchanger and is approximately the same size as the outer peripheral shape, the heater is surrounded by the heat exchanger on the flat bottom of the outdoor unit base. When installed, the heater will not be far from the installation space of the heat exchanger, and if it is installed so that more than half is below the heat exchanger, the heat exchanger will be far away from the space surrounded by the heater There is nothing.
[0007]
The outdoor unit of the air conditioner according to claim 2 is the outdoor unit according to claim 1, wherein the drain hole is formed as a drain hole that opens in a part of the flat bottom, and the heater pipe portion in the vicinity of the drain hole is formed in the isolation plate. The heater is fixed by holding it on the flat bottom of the outdoor unit base while being surrounded by the long concave portion.
[0008]
Further, the outdoor unit of the air conditioner according to claim 3 is the outdoor unit according to claim 2, wherein when the pipe portion of the heater is pressed by the long concave portion, the outdoor unit is pressed by the convex portion formed on the inner surface of the concave portion of the isolation plate. is there.
[0009]
The outdoor unit of the air conditioner of claim 4 is the outdoor unit of claim 2, wherein a drain socket is attached to the drain hole from the side opposite to the heat exchanger side, and the isolation plate has a socket hole in the center. The isolation plate is attached to the flat bottom of the outdoor unit base so that the drain hole opens in the socket hole.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to the drawings.
FIG. 1 is an exploded perspective view of the outdoor unit according to the first embodiment, FIG. 2 is a perspective view of the isolation plate, and FIG. 3 is a cross-sectional view of the heater mounting portion.
In these drawings, 1 is an outdoor unit base of an outdoor unit of an air conditioner, 1a is a flat bottom of the outdoor unit base 1, 1b is a screw hole of the outdoor unit base 1, 2 is a heat exchanger, 2a is a heat exchanger 2 Bottom portion, 3 is a tubular heater such as a sheathed heater, 3a is a tube portion of the heater 3, 4 is a drain hole provided in the base of the outdoor unit, 5 is an isolation plate, 5a is a recess of the isolation plate 5, and 5b is an isolation plate 5, 6 is a fixing screw for fixing the isolation plate 5 to the outdoor unit base, 7 is a drain socket, 8 is a convex portion in the recess 5 a of the isolation plate 5, and 9 is formed at the center of the isolation plate 5. Socket hole.
[0011]
The outdoor unit base 1 is a shallow container having a flat bottom 1a with a flat bottom, and a drain hole 4 having a circular cross section that is open to a part of the flat bottom 1a is formed in the flat bottom 1a. However, the cross section is not limited to a circular shape, but may be a free shape, but the drain socket 7 can be attached so as to open at a part of the flat bottom 1a, and concentrated drainage can be performed from here.
That is, the drain hole 4 is a drain hole 4 that is opened in a part of the flat bottom 1a, so that the drain socket 7 is attached to the drain hole 4 when the outdoor unit is installed on a veranda or the like by using a suspension base. By connecting the hose, it is possible to guide the drain and prevent the water from dripping.
In the example of FIG. 1, the heat exchanger 2 has a thin L shape. Although it is not necessarily thin, in particular, the dripping range of the drain is limited, and when the heat exchanger 2 is surrounded by the tube portion 3a of the heater 3, the temperature in the enclosed flat bottom 1a is high. It is easy to go up and keep warm, which is advantageous for preventing the drain from freezing.
[0012]
The heater 3 is a tubular heater such as a sheathed heater, and has a shape that follows the outer peripheral shape of the bottom portion 2a of the heat exchanger 2 and has a substantially closed shape, that is, in the example of FIG. 1, the L-shape of the bottom portion 2a. The pipe portion 3a is bent into a shape similar to the shape, and processed into a shape that forms an L-shaped enclosure that is substantially closed on a plane. Further, the heat exchanger 2 is processed to have substantially the same size as the outer peripheral shape of the bottom 2a.
Here, the “substantially closed shape” means that when the tubular heater 3 forms a shape that follows the outer peripheral shape of the bottom 2a of the heat exchanger 2, even if there is an open portion, the heater 3 is in this portion. It is included in the “substantially closed shape” as long as the drain does not freeze in the enclosure. In addition, “substantially the same size” includes a case where the overall outer shape of the bottom 2a of the heat exchanger 2 is one size larger or one size smaller, and there is a partial shape difference. Is also included.
The heater 3 is installed on the flat bottom of the outdoor unit base so as to surround the heat exchanger 2, or is installed so that most of the shape of the heater 3 is below the heat exchanger 2, or the heater Install so that at least half of the three shapes are below the heat exchanger 2.
Therefore, the heater 3 is formed in a shape that follows the outer peripheral shape of the bottom portion 1a of the heat exchanger 2 and is approximately the same size as the outer peripheral shape. Therefore, the heater 3 is heated on the flat bottom 1a of the outdoor unit base 1. When installed so as to surround the exchanger 2, the heater 3 is not greatly separated from the installation space of the heat exchanger 2, and when installed so that more than half is below the heat exchanger 2, the heat exchanger 2 is not far away from the space surrounded by the heater 3.
Therefore, the drain dripping from the heat exchanger 2 is almost within the enclosure shape of the tubular heater 3, and when the heater 3 is energized, the enclosure shape of the tubular heater 3 on the flat bottom 1 a of the outdoor unit base 1 is The drainage can be prevented by raising the temperature.
[0013]
As shown in FIG. 2, the isolation plate 5 has a rectangular shape as a whole, long recesses 5a and 5a are formed in the longitudinal direction of both ends, and two screws 6 are inserted in the center of both end portions in the longitudinal direction. Screw holes 5b and 5b are formed, and a socket 9 is formed at a portion surrounded by the recesses 5a and 5a and the two screw holes 5b and 5b for the screw 6, that is, at the center.
Further, the socket hole 9 formed in the central portion of the isolation plate 5 has the isolation plate 5 attached to the flat bottom 1a so that the drain hole 4 opens in the socket hole 9, so that the bottom of the drain hole 4 (the bottom plate 1a This is a shape that does not interfere with the drain socket 7 attached from the side opposite to the heat exchanger 2 side.
[0014]
Next, these assemblies will be described.
A heater 3 is installed on the flat bottom 1 a of the outdoor unit base 1. At this time, the drain hole 4 and the two screw holes 1 b and 1 b for the screw 6 are made to enter an L-shaped substantially closed enclosure formed by the tube portion 3 a of the heater 3. In this case, by making the drain hole 4 within the enclosure of the heater 3, it is possible to prevent the drain hole 4 from being blocked by drain freezing.
Then, the long concave portions 5a and 5a of the isolation plate 5 are aligned with the parallel pipe portion 3a of the heater 3, that is, the pipe portion 3a of the heater 3 in the vicinity of the drain hole 4, and screw holes 5b and 5b for the screw 6 are also provided. Is aligned with the screw holes 1b and 1b, the isolation plate 5 is placed on the heater 3 on the flat bottom 1a, the two screws 6 and 6 are screwed in, and the heater 3 is fixed to the outdoor unit base 1. At this time, the heater 3 is fixed by pressing the parallel tube portion 3a against the flat bottom 1a while enclosing it with the long concave portions 5a and 5a.
[0015]
Next, the heat exchanger 2 is installed on the flat bottom 1a. The heat exchanger 2 may be installed in the enclosure of the tube portion 3a of the heater 3, that is, the heater 3 may be installed so as to surround the heat exchanger. Further, the heat exchanger 2 may be installed on the tube portion 3 a of the heater 3, that is, the tube portion 3 a of the heater 3 may be installed below the heat exchanger 2.
However, when the heater 3 is installed so as to be under the pipe portion 2 a of the heat exchanger 2, the heat exchanger 2 is not greatly protruded from the pipe portion 2 a of the heater 3. That is, more than half of the tube portion 2 a of the L-shaped heater 3 is placed under the heat exchanger 2.
Finally, the drain socket 7 is attached to the drain hole 4 of the flat bottom 1a from the side opposite to the heat exchanger 2 side.
Note that a blower that blows air to the heat exchanger 2 is installed in an empty portion on the outdoor base 1.
[0016]
The fixing of the heater 3 by the isolation plate 5 will be further described with reference to FIGS.
One convex portion 8 in the concave portion 5a of the isolation plate 5 protrudes from the apex of the inner surface of the concave portion 5a toward the tube portion 3a one by one near both ends of the long concave portion 5a. Then, the concave portion 5a surrounds the tube portion 3a and is screwed, whereby the convex portion 8 comes into contact with the tube portion 3a and is pressed against the flat bottom 1a. That is, a gap is formed between the other part of the recess 5 a of the isolation plate 5 and the heater 3. However, a plurality of (for example, 2 to 3) convex portions 8 may be provided near both ends. In this case, it can fix more stably.
Further, by surrounding the parallel tube portion 3a with the recesses 5a and 5a of the isolation plate 5, the tube portion 3a of the heater 3 around the drain hole 4 is not exposed.
Therefore, the isolation plate 5 functions to fix the heater 3 to the outdoor unit base 1 and to prevent the finger from touching the heater 3 directly when the finger is inserted from the drain hole 4 after installation, thereby preventing product burns. It also serves to ensure sex.
[0017]
Next, the function of the convex portion 8 in the concave portion 5a of the isolation plate 5 will be described.
When the heater 3 is energized in order to prevent drainage from draining and draining in winter, the temperature of the heater 3 does not rise so high as to cause burns. However, if the heater is energized in the summer due to a runaway control circuit, etc. Considering this, it is necessary to protect the heater 3 and the part that may touch the surrounding fingers from being heated.
Since the outdoor unit base 1 itself has a large amount of heat transfer from the part in contact with the heater 3 to the surroundings, if the heater unit of the outdoor unit base 1 is touched from the lower surface of the flat bottom 1a, it will cause burns. However, in the isolation plate 5 having a small part area, the temperature of the isolation plate 5 itself increases as the temperature of the heater 3 rises, so that a burn is caused by putting a finger through the drain hole 4 and touching the isolation plate 5. there is a possibility.
Therefore, the isolation plate 5 is provided with a convex portion 8 for reducing the direct contact portion with the heater 3, and a gap is provided between the isolation plate 5 and the heat conduction to keep the temperature of the isolation plate 5 low. be able to.
[0018]
A drain hole 4 provided in the flat plate 1a of the outdoor unit base 1 is placed in an L-shaped enclosure formed by the tube portion 3a of the heater 3 (so as to enter a substantially closed shape), and one place. It is good also as several places (for example, 2-3 places). When this outdoor unit is installed at a high place, a drain socket 7 is attached to each, a hose is attached to the drain socket 7, and the drain is gathered in the middle to guide the drain.
Further, the drain hole 4 may have a long hole shape. However, in this case, the drain hole 4 is placed in an L-shaped enclosure formed by the tube portion 3a of the heater 3 (so that it is in a substantially closed shape), and the drain socket 7 is attached. Absent. In this case, the heater 3 is attached to the flat bottom 1a of the outdoor unit base 1 by any ordinary method.
If it is a long hole, since it is in the enclosure of the heater 3, the drain is not frozen, and the dripped drain is immediately discharged to the outside from the opening of the nearby drain hole 4.
[0019]
According to the outdoor unit of the air conditioner of the present embodiment, the drain hole 4 is formed as a drain hole 4 that opens to a part of the flat bottom 1 a, and the pipe portion 3 a of the heater 3 in the vicinity of the drain hole 4 is connected to the isolation plate 5. Since the heater 3 is fixed by being pressed against the flat bottom 1a of the outdoor unit base while being surrounded by the formed long concave portion 5a, the heater 3 can be fixed to the outdoor unit base 1 by the isolation plate 5 and directly from the drain hole 4. A finger can be prevented from coming into contact with the heater 3.
[0020]
Moreover, according to the outdoor unit of the air conditioner of the present embodiment, when the tube portion 3a of the heater 3 is pressed by the long concave portion 5a, it is pressed by the convex portion 8 formed on the inner surface of the concave portion 5a of the isolation plate 5. In addition to being able to fix the heater 3, even if the heater is energized, the temperature of the isolation plate 5 can be prevented from becoming high, and burns when in contact are prevented.
[0021]
Moreover, according to the outdoor unit of the air conditioner of the present embodiment, the drain socket 7 is attached to the drain hole 4 from the side opposite to the heat exchanger 2 side, and the isolation plate 5 has the socket hole 9 at the center. Since the isolation plate 5 is attached to the flat bottom 1a of the outdoor unit base 1 so that the drain hole 4 is opened in the socket hole 9, the isolation plate is used when the drain socket 7 is attached to the drain hole 4 of the outdoor unit base 1. By the socket hole 9 provided in 5, the drain socket 7 and the isolation plate 5 can be attached without interfering with each other.
[0022]
【The invention's effect】
An outdoor unit of an air conditioner according to the present invention is an outdoor unit in which a heat exchanger is installed on an outdoor unit base, and a tubular heater is substantially closed in a shape that follows the outer peripheral shape of the bottom of the heat exchanger. It is formed in a shape that is almost the same size as the outer shape, and the heater is installed on the flat bottom of the outdoor unit base so as to surround the heat exchanger, or more than half of the shape is a heat exchanger It is installed so that the drain hole which opens to the flat bottom of the outdoor unit base is in the substantially closed shape of the heater.
[0023]
Therefore, since the heater is formed in a shape that follows the outer peripheral shape of the bottom of the heat exchanger and is approximately the same size as the outer peripheral shape, the heater is surrounded by the heat exchanger on the flat bottom of the outdoor unit base. If the heater is installed so that the heater is not greatly separated from the installation space of the heat exchanger and more than half is below the heat exchanger, the heat exchanger is greatly separated from the space surrounded by the heater. In any case, the drain dripping from the heat exchanger is almost within the enclosure shape of the tubular heater. Then, by energizing the heater, the inside of the flat-bottomed tubular heater enclosure of the outdoor unit base is heated to prevent the drain from freezing.
In addition, since the drain hole is within the enclosure of the tubular heater, the drain hole is not frozen, so that the drain can be discharged to the outside from the drain hole.
Moreover, since the outdoor unit base is provided with a heater and a heat exchanger on a flat bottom, the structure of the outdoor unit base can be simplified.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of an outdoor unit of an air conditioner according to Embodiment 1 of the present invention.
FIG. 2 is a perspective view of an isolation plate according to Embodiment 1 of the present invention.
FIG. 3 is a cross-sectional view showing a heater mounting portion according to Embodiment 1 of the present invention.
FIG. 4 is a cross-sectional view showing an outdoor unit base portion of a conventional air conditioner.
FIG. 5 is a perspective view showing an outdoor unit base portion of a conventional air conditioner.
[Explanation of symbols]
1 outdoor unit base, 1a flat bottom, 2 heat exchanger, 2a bottom part, 3 heater, 3a pipe part, 4 drain hole, 5 isolation plate, 5a concave part, 7 drain socket, 8 convex part, 9 socket hole.

Claims (4)

In an outdoor unit that installs a heat exchanger on the outdoor unit base,
The tubular heater has a shape that follows the outer peripheral shape of the bottom of the heat exchanger, is formed in a substantially closed shape, and has a shape that is approximately the same size as the outer peripheral shape
The heater is installed on the flat bottom of the outdoor unit base so as to surround the heat exchanger, or is installed so that more than half of the heater shape is under the heat exchanger, and further, the outdoor unit An outdoor unit of an air conditioner, wherein the outdoor unit of the air conditioner is installed so that a drain hole opened in the flat bottom of the base is in a substantially closed shape of the heater. The drain hole is a drain hole that opens to a part of a flat bottom, and the heater tube in the vicinity of the drain hole is surrounded by a long concave portion formed in an isolation plate and is held by the flat bottom of the outdoor unit base. The outdoor unit for an air conditioner according to claim 1, wherein the heater is fixed. The outdoor unit of an air conditioner according to claim 2, wherein when the tube portion of the heater is pressed by a long concave portion, the outdoor portion of the air conditioner is pressed by a convex portion formed on the inner surface of the concave portion of the isolation plate. The drain hole has a structure in which a drain socket is attached from the side opposite to the heat exchanger side, the isolation plate has a socket hole in a central portion, and the drain hole opens in the socket hole. The outdoor unit for an air conditioner according to claim 2, wherein an isolation plate is attached to the flat bottom of the outdoor unit base.

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